TY - JOUR
TI - Laboratory study on acid fracturing performance in high temperature carbonate reservoirs
AU - Zhang Xiong
AU - Cao Xu-Sheng
AU - Sun Yao-Yao
AU - Liu Lian
AU - Zhao Bing
AU - Geng Yun-Di
JN - Thermal Science
PY - 2024
VL - 28
IS - 2
SP - 1113
EP - 1119
PT - Article
AB - In this article, we investigate acid fracturing, a promising method to increase the effectiveness of fractures in high temperature carbonate reservoirs. In order to determine the performance of acid fracturing in carbonate reservoirs, we conducted a lab scaled true triaxial acid fracturing experiment on high temperature carbonate rock. The fracture initiation, propagation behavior, and conductivity under the action of acid solution were analyzed. The 3-D micro computed tomography was applied to illuminate the fracture network patterns; coefficient of stress difference, acid etching time, and acid concentration were also analyzed. Results show acidification exhibits the lowest breakdown pressure compared with no-acidification, reduced by 58%.